VIKRAM SOLAR
INS
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TION MANUAL
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07.3
INVERTER SELETION AND COMPATIBILITY
Only connect the quantity of modules that corresponds to the voltage specifications of the inverters
used in the system. When installed as per IEC norms and regulations, Vikram Solar modules
normally do not need to be electronically connected to earth and can operate with either galvanic
ally isolated (with transformer) and transformer less inverters. If the system is located in hot and
very humid locations then galvanically isolated Inverters with Transformers must be used and the
negative pole of the array must be connected to earth. It is recommend to adopt inverter negatively
earthed installation to avoid the PID effect. If a Transformer less Inverter is used in hot humid
climatic locations, The Installer should ensure the right active negative earthing kit is to be installed
by consulting and having assurance from the inverter supplier.
Well-designed PV Plant requires minimum maintenance but however with further maintenance the
performance and the reliability of the system can be improved
Periodica maintenance by a trained professional is usually advised
Regular maintenance is required to keep modules clear of snow, bird droppings, seeds, pollen,
leaves, branches, dirt spots, and dust.
Modules with sufficient tilt (at least 15°), generally do not require cleaning (rain will have a self-
cleaning effect).
Check that the mounting structures are properly laid and the modules are held tightly and are in
accordance with the mounting instructions given above
Ensure no part of the light falling area of the module is shaded, any leaves / trees or any object
which causes shading has to be removed accordingly
Ensure all the cable assembly is tight and no part of cable assembly will be exposed to water
logging
Check that the string fuses in each non/earthed pole are in operation
Do not open the junction box to change the diodes even if they are defective. Please contact with PV
module manufacturer in case of known or suspected diode failure
Ensure the module is cleaned without causing any damage like micro-crack, etc. to the module
Cover the front and back surface of modules by an opaque material when repairing. Modules when
exposed to sunlight generate high voltage and are dangerous
Always recommended to have the module clean and tidy for maximum power generation from the
solar PV module
08.1
CLEANNING
The amount of electricity generated by a solar module is proportional to the amount of light falling
on it. A module with shaded cells will produce less energy and therefore it is important to keep
modules clean.
It is recommended to check TDS of the cleaning water on regular basis. TDS should be maintained
below 500 mg/L & total hardness shall be less than 75 mg/L;
Clean PV modules when the irradiance is below 200W/m
2
; liquid with a large temperature difference
from the modules shall not be used for cleaning the modules;
When cleaning with pressurized water, the water pressure on the glass surface of the module shall
not exceed 700 kPa (14619.80psf); the module is prohibited to bear the extra force;
When cleaning PV modules, do NOT step on the modules; do NOT spay water on the the cables;
keep the connectors clean and dry; prevent fire and electrical shock from occurring; do NOT use as
steam cleaner;
10
08
.
MAINTENANCE AND CARE
